Question

the arithmetic mean between terms of a sequence is -4. if one of the terms is 17, find the other term
a.-10 b.-15 c.-20 d.16​

Answer 1

Answer

t1= -10,t2=-15,t3=-20,t4=16

common difference= -5

tn=a+(n-1)d

t17=-10+(17-1)-5

t17=-10+(16)-5

t17=-10-80

t17=-90

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